Combined fire and burglar alarm.



J. M. WALKER.

V COMBINED FIRE AND BURGLAR ALARM.

APPLIOATION FILED 001.22, 1910.

1,006,608. Patented 001211911.

111' I D m WW cl fmlfiew;

m an 1% COLUIAUIA PLANPGRAPH C0,,WASNINGTON D C JAMES M. WALKER, 0FQUILL LAKE, SASKATCHEWAN, CANADA.

COMBINED FIRE AND BURGLAB ALARM.

Specification of Letters Patent.

Patented Oct. 24, 1911.

Application filed October 22, 1910. Serial No. 588,522.

To all whom it may concern:

Be it known that I, JAMES M. WALKER, a citizen of the Dominion ofCanada, residing at Quill Lake, in the Province of Saskatche-.

- above described character which isvery reliable in its operation andwhich upon the occurrence of a fire or an attempt to force an entranceinto the apartment, will automatically operate a telephone and give thenecessary alarm at the fire department or police headquarters.

With the above and other objects in view, the invention consists of thenovel features of construction, combination and arrangement of partshereinafter fully described and claimed, and illustrated in theaccompanying drawings, in which- Figure 1 is a view showing the interiorof an apartment, illustrating the manner in which my improved alarmsystem is installed; Fig. 2 is a section taken on the line 22 of Fig. 1,showing the connection of the operating cord to the sashes of a window;and Fig. 3 is a section taken on the line 33 of Fig. 1 illustrating themanner in which the device is operated by the opening of a door.

Referring more particularly to the drawing 5 designates a bar or armpivotally mounted at one end as shown at 6. This arm is normally held ina substantially vertical position by means of a contractile spring 7 oneend of which is secured to the arm and the other end to the wall of theapartment or other stationary object. This arm is positioned inconvenient relation with respect to a telephone box 8 which has amagneto therein, the magneto shaft extending through the box and havinga crank 9 formed on one end. This crank is adapted to be disposedbeneath the free end of the arm or bar 5 to maintain the coiled spring10 which rotates the magneto shaft under tension.

To the free end of the arm or bar 5 one end of an operating cord 11 issecured, said cord passing around pulleys 12 arranged upon the walls ofthe apartment. This operating cord may be arranged in any desired mannerand placed in position where a fire would be most likely to originate.In order to utilize the device as a burglar alarm as well as a firealarm the cord is extended above the window of the apartment and isdrawn downwardly as shown at 12 to provide a loop portion. A resilientU-shaped strip of metal 13 has its ends disposed in staples 14: securedto the upper rail of the lower sash and the lower rail of the upper sashwhen the sashes are closed. Staples 1 1 are also secured to the sashframe to receive the ends of the spring plate when it is desired toadjust the sashes. A pulley 15 is arranged upon this spring strip aroundwhich the looped portion 12 of the operating cord passes. After passingover supporting pulleys arranged upon the wall, the operating cord isagain drawn downwardly to provide a second 100p 12 adjacent to the doorD of the apartment. This door carries a key actuated bolt of anyordinary form whereby the same may be securely locked, said bolt beingmovable into a casing C arranged on the door ja-Inb. A plate 16 ismovable through the top of the casing and has a hook 16 therein toreceive the locking dog B when the door is locked. A stud 17 istransversely disposed within the casing beneath the locking bolt. Thisstud is adapted to be engaged by the hook 16 of the trip plate when thedoor is being constantly opened and closed by persons occupying theapartment thereby maintaining the operating cord taut without releasingthe slack therein which would cause the operation of the alarm. The endof the operating cord after the same has been extended around the wallsof the apartment is fixed to a drum 18 upon which it is adapted to bewound to take up the slack therein after the spring plate has ,eralfunctions will be apparent.

the tension of the regulated to retract said arm upon the release ofeither "of the trip elements or the burning of the cord.

From the above the operation of my improved system will be obvious.Should afire originate in the apartment around the walls of which theoperating cord extends, the cord will be burned through which willpermit the spring 7 to retract, thereby drawing the cord around thepulleys arranged upon the Walls and carried by the trip elementconnected to the -window sashes and engaging the door bolt. Thisretraction-of the spring and releasing the operatingcord thus 7 toretract.

1s operated to unlock moved out of the-notch l6 drawn through thevarious arm 5 elevatedtocause the telephone andnotify the policedepartment with which the telephone is connected.

pulleys and the the manner in which the arranged for the performance oftheir sev is very reliableand operation and by its use attemptedburglary 1s frustrated and the destruction of the;

spring may be suitably movement of said sashes disengaging the 'end' ofthe springtrip plate lowered portion of "the permitting the spring Ifforcible entry is attempted by means of the door, when "t-he'lockingbolt I the door it will be? in the trip plate thus permitting theoperating cord to be operation ofthe The device eflicient in practicalbuilding'by'fire is prevented. *It will of course be obvious that theoperating cord maybe extended exteriorly of the apartment and to theother parts of the building, or each of the rooms or apartments may beprovided with a separate cord, and the telephones connected in circuitwith a main telephone which is operated from any one of the apartmentsgiving the alarm.

While I have shown and described the preferred construction andarrangement of the various parts,'it will be understood that the deviceis susceptible of considerable modification without departing from theessential feature or sacrificing any of the advantages of the invention.

Having thus described the mvention what 1s claimed is The combinationwith a telephone having a spring actuated crank to operate the telephonecall bell, of a pivotally mounted arm normally engaged with said crank'to prevent operation of the call bell, an operating cord connected tosaid arm and extended over the walls of an apartment, a resilient hookconnected to said cord and to the sashes "of a window, a hook connectedto the operatmgcord and engaged with the'bolt of a door, a drum on whichsaid operating cord is adapted to be wound to hold the same taut, a pinto be engaged by the hook and hold the same out the door bolt withoutretheburning of-the cord or of contact with lea sing *the' cord,

the disengagement of said hooks from the window sashes or the door boltslackening the operatmgcord, and means 'for elevating i thejpivoted armout of contact with said From the foregoing it is. believed that variousparts are crank whereby the telephone call *bell is operated.

In testimony whereof I hereunto affix'my signature in the presenceof'two witnesses.

JAMES M. "WALKER. Witnesses C. F REDERICK'SON,

G120. H. YULE.

Copies of'thi's patent may be obtainedfor five cents each,by'addressingthe Commissioner of Patents,

Washington, D. G.

